Inverse lupdate

Long story short: we have started a project with English UI because of some unknown reasons related to the improper UTF-8 handling on Windows. Later we have figured out that a piece of code:
[code]
QTextCodec::setCodecForCStrings(QTextCodec::codecForName("UTF-8"));
QTextCodec::setCodecForLocale(QTextCodec::codecForName("UTF-8"));
QTextCodec::setCodecForTr(QTextCodec::codecForName("UTF-8"));
[/code]
solves our problems.

Now we would like to switch back to our native language in the UI because it would make the development process more efficient.

Basically I am looking for a script/software which would go back to the source/ui files and would replace the strings with the localized ones. I do not know if such a software would exists, but if yes I would not like to invest time in developing something already existing.